heart never stops beatin' for you ♪ ♪ ooh long after you're gone gone gone i'll love you long after you're gone ♪ ♪ gone gone ♪ >> jimmy: phillip phillips. the cd is called "the world from the side of the moon." you can see a bonus song at jimmykimmellive.com. thanks to ray romano, thanks to amy brenneman. apologies to matt damon, we ran out of time. tomorrow night, mark wahlberg, jennifer lopez and science bob. thanks for watching. stay up for "nightline." good night.

tonight on "nightline," she's charged with shooting, stabbing, and slashing her one-time boyfriend. tonight, the explosive recordings exposing her changing story and her web of lies. hot, sweaty, and under fire. he claims he can help you live longer and improve your sex life. the millionaire guru and the accusation shaking his hot yoga empire. secret brazil. we journeyed to the hidden corners of south america for close encounters with nature's noble and not so noble beasts.

from new york city, this is "nightline" with cynthia mcfadden. >> good evening, and thanks for joining us. tonight, we begin with a shocking story of love gone deadly wrong. the latest twist in the murder trial of 32-year-old woman charged with shooting, stabbing, and slashing her one-time boyfriend. well, she's admitted to police that she did indeed kill him. she's claiming it was self-defense. but today, explosive new tapes reminded the jury that that was not always her story. here's abc's ryan owens. >> if travis were here today, he would tell you that it wasn't me. r >> reporter: her web of lies untangles before our lies. >> i'm all for the ten commandments. thou shalt not kill. >> reporter: every detail shown to riveted jurors, who will

decide if jodi arias should die for her crime. >> if i hurt travis, if i killed travis, i would beg for the death penalty. >> reporter: for the last three days, the prosecutor has played interrogation videos of arias from july of 2008. she's just been arrested for the brutal murder of alexander. >> i'm begging you to at least come clean and tell me why. >> i wish that i had answers. i'm sorry. >> reporter: he was found butchered in the somehhower of home. >> if i was trying to kill somebody, i would use gloves. i have plenty of them. >> reporter: the 30-year-old businessman and devout mormon had been stabbed 27 times. his throat slit so deep he was almost de ceglcapitated. and he was shot in the head. >> this is over. this is absolutely over. you need to tell me the truth. >> the truth is i did not kill travis. >> reporter: on the tape, arias repeatedly denies she was at

alexander's house after the crime. even after the detective confronts her with racy pictures of her in that bed that day. >> that looks like me. >> reporter: even after he tells arias her palm print was found at the bloody crime scene. >> how can that be my palm point? >> reporter: at one point, the detective leaves the room. arias stretches in the chair. then she stretches the truth even more. the admitted killer really turns on the tears. >> i'm just feeling all the thing things, with my family and i thing of all the things that travis's family is going to miss out with travis. >> reporter: alexander's sisters watched as their brother's admitted kill er -- over and over. arias is back with a new outfit,

a jail jump suit and a very new story. >> i actually didn't see it, i heard it. >> reporter: now she admits she was at his house that day, but says two masked intruders broke in. she even acts out how she cowered in the corner as the duo slaughtered alexander and threatened her family mafia-style. arias again tells the detectives if she were going to kill alexander, she would definitely do it differently. >> i don't think i could stab him. i think i would have to shoot him. >> reporter: only years later did arias finally admit she was killer. her attorneys are trying to convince this jury she did it in self-defense, after the couple fought. >> in just those two minutes, jody had to make a choice. she would either live, or she would die. >> reporter: but prosecutors allege arias is a stalker who brutally attacked her ex in a jealous rage when she found out

he was seeing other women. arias's defense, which is expected to start next week, will have to overcome a mountain of forensic evidence, including pictures taken on this camera found in alexander's washing machine. prosecutors say arias literally tried to wash that evidence away. but on its memory card, detectives discovered not just those racy photos from the couple's sexual encounter the day of the murder, but a series of 20 shots of alexander posing in the shower minutes before his death. prosecutors say arias put down the camera, and picked up a knife, stabbing her unsuspecting victim. the most damning picture comes after the camera was dropped. it's too graphic for us to show, but the jury saw a shot of what appears to be arias actually moving the bloody body. prosecutors say she was especially cold-blooded after the crime. >> hey, what's going on? >> reporter: they played this voicemail arias left on

alexander's phone a few hours after she killed him. morbidly enough, she invited a man she knew was dead to come visit her. >> let me know and i will talk to you soon. >> reporter: jodi arias has broken down in tears nearly every day in this trial. in the weeks to come, most expect she will take the stand. that she almost has to to convince the jury she killed in self-defense. >> i did not hurt travis. >> reporter: by then, the prosecutor hopes the jury will have heard so many of her lies they won't believe a word out of her mouth and sentence her to death. something she boldly predicted would never happen in an interview with the show ""inside edition"." >> no jury is going to convict me. >> reporter: why not? >> because i'm innocent and you mark my words on that one. no jury will convict me. >> reporter: i'm ryan owens for "nightline" in phoenix. next up, the famous yoga guru whose army of disciples and the accusations that are turning up the heat on his multi-million-dollar empire. [ male announcer ] this is steve.

he loves risk. but whether he's climbing everest, scuba diving the great barrier reef with sharks, or jumping into the market, he goes with people he trusts, which is why he trades with a company that doesn't nickel and dime him with hidden fees. so he can worry about other things, like what the market is doing and being ready, no matter what happens, which isn't rocket science. it's just common sense, from td ameritrade.

kids make stains i use tide boost to super charge our detergent. boom. clothes look amazing, and daddy's a hero. daddy, can we play ponies? right after we do foldies. tide boost is my tide. what's yours? [ male announcer ] every time you say no to a cigarette you celebrate a little win. nicorette gum helps calm your cravings and makes you less irritable. quit one cigarette at a time. and makes you less irritable. i've got two tickets to paradise!l set? pack your bags, we'll leave tonight. uhh, it's next month, actually... eddie continues singing: to tickets to... paradiiiiiise! no four. remember? whoooa whooaa whooo! you know ronny, folks who save hundreds of dollars by switching to geico sure are happy. and how happy are they jimmy? happier than eddie money running a travel agency. get happy. get geico. fifteen minutes could save you fifteen percent or more.

heal your illnesses, live longer, be even better in bed -- just by doing yoga? it certainly seems like a tall order. but one world famous yoga claims his special brand of hot yoga can do all of that and more. he's built a multi-million-dollar empire, but now he is coming under fire for methods critics call less than enlightened. here's abc's david wright.

>> reporter: that guy in a speedo has literally made millions off the sweat of others. bikram pioneered hot yoga. 26 poses performed in excruci e excruciating 105-degree heat. >> reporter: why the heat? >> it's that simple. if you take a piece of steel to a blacksmith, say hey, can you make a knife? what's he going to do? >> reporter: fire up the kiln. a booming business, bikram inc. his name is a trademark. his routine copyrighted. it's franchised just like mcdonald's. all these hard body disciples are hoping to become bikram yoga teachers. why do you think americans are so fascinated by yoga? it seems like everywhere you go, there's a yoga studio. >> because of me.

>> reporter: he is not a modest man. his detractors say he has corrupted yoga with too much commercialism. >> he's trying to control and own it. >> reporter: and a tendency to bulldoze others. >> [ bleep ]. >> you don't want to get on bikram's dark side because he can make your life a living held. >> reporter: bikram started off in this country 40 years ago in beverly hills as a sort of yogi to the stars. among them, michael jackson, shirley maclaine, and martin sheen. you've built an empire. >> i've built an empire. why not? half a billion people have been benefited directly, indirectly from bikram. >> reporter: half a billion? >> half a billion people benefited. >> reporter: bikram has certainly benefited. he has a warehouse of luxury cars. >> beatles take two movies with this car. >> reporter: his hobby is restoring them, perfecting them

the same way he perfects people's bodies with his yoga. >> exactly the way you rebuild a car, same way i rebuild human body. >> reporter: bikram insists his yoga won't just improve your body and invigorate your sex life, he claims it saves lives. >> i cure patient, absolutely no hope. 98% heart was clogged. send him to me. eight months later, i send him back, brand-new heart, like a panther heart. >> reporter: in fairness, i was willing to try it. not exactly reaching nirvana, but lightheaded enough to want more. i survived. >> you should do this yoga. >> reporter: this american guru now has uniquely american problems, forcing him to defend his lucrative yoga practice in court. >> american way. make bikram yoga, copyright, trademark, franchising, patent. the justice department, the

government will protect you. american way. >> reporter: yoga to the people is one of four groups bikram has sued for copyright infringement. the rival school was founded by bikram's former protege greg, that's him in the photo standing behind bikram. and you say this fellow is a thief? >> definitely. he was my student. i trained him. then he get greedy. >> reporter: he says the very idea of copyrighting a 5,000-year-old hindu discipline is absurd. >> it would be like if arnold schwarzenegger said i'm going to do five bench presses, six curls, call it around's workout, nobody can show that or teach that without my permission. that's crazy to me. >> reporter: after our interviews, but before the case went to trial, the two men abruptly settled. just last month, another yoga school run by form eer bikram students said that it's not copyrightable. the judge ruled they cannot be held liable for copy right

infringement. bikram and his legal team plan to appeal. meanwhile, they have another case looming, brought by this woman, pandora williams. >> i love yoga. i wanted to share what yoga has done for me. >> reporter: she spent about $11,000 to attend his teacher training course in 2010. >> it was a complete and utter mind blowing horrible experience. >> reporter: she was offended by some of the things she says bikram said. his banter during classes is often sexually charged and off color. that helps distract people through 90 minutes of body bending held. >> women are bitches and whores, they're here for one thing, to spread their legs and make babies. >> reporter: he was saying this in front of all the people?

>> yes, in front of 400-some-odd employees. >> reporter: what happened when you challenged him? >> i walked up to him and i said bikram, you're breaking my heart. that's what i said to him first. why are you preaching hate when there's so much hatred already in this world? >> reporter: what was his reaction? >> we don't sell hate here, [ bleep ]. >> reporter: the case is scheduled to go to trial in march. bikram declined to talk about the case on camera but abc news obtained video of his deposition. >> during ms. williams training, you repeatedly referred to women as bitches, correct? >> no, i don't know. >> have you ever referred to women as bitches in any of your training? >> no. >> reporter: in it, he claims williams approached him in a threatening manner. >> were you fearful? >> what do you mean by fearful?

>> did you think she was going to hurt you physically? >> yes. >> reporter: he categorically rejects her accusations. >> he should not be allowed to spew so much hatred in our society and hide behind yoga, which is so beautiful and pure. it's only here to help us. >> reporter: do you think he's a spiritual person? >> no. he is driven by money only. >> i do not lie, never cheat, i never hurt another spirit. i'm the most spiritual man you ever met in your life. but today, you are not old, educated, smart, intelligent, wise, expedient enough to understand who i am. you will be one of these days if you practice bikram yoga, you will understand that. >> maybe so. >> yes. not today. >> reporter: an american guru on the hot seat. i'm david wright for "nightline" in beverly hills. just ahead, the fierce, the ferocious, and the humble. our team tracks down the exotic

creatures lurking in the secret wild of brazil. i've always been. he good driver i'm just out here, snap-shooting it forward. you don't want to have to pay for other people's bad driving, do you? no. with progressive snapshot, you don't have to. i'm going to snap it right now. bam, there it is. goes underneath your dash. keep safe, and keep saving. you know, i won't always be around to save you money. that's why you should get snapshot from progressive. all right, dude! thanks! to the safe go the savings. i you're suffering from constipation, miralax or metamucil may take days to work. for faster relief, try dulcolac laxative tablets. dulcolac provides gentle relief overnight unlike miralax and metamucil that can take up to 3 days.

[ male announcer ] want to make a great car interior? stop looking at car interiors. get inspired by other stuff. yep. yep. ok. sure. why not? woah. touchscreens. put that in your dash. now, luxury stuff. make your seats like that. that thing has wifi, why doesn't your car? you can't do that. ignore that guy. give it wifi. yes! make it fit 5 people. no, 5 actual sized people. give them leg room, good. destroy boring car interiors forever. and that's how you do it. easy. ♪

when it comes to seeking out brazil's most fascinating creatures, the amazon jungle has a way of stealing the spotlight. but from giant snakes to elusive big cats, one man is out to prove other parts of the country have just as much to offer. >> reporter: brazil's amazon and its nebraska-sized wetlands are prowled by nature's most fearsome beasts, the elusive jaguar, the crocodile, the anaconda, but it takes a special kind of man to love a 150-pound rat. >> it's the biggest rodent on earth. >> reporter: and that man is lawrence waba. they have the honor of being the favorite food of -- >> jaguars. >> reporter: lawrence spent a

quarter of a century filming wildlife here. already showed us one side of brazil a couple of months ago. >> don't move. >> reporter: an unparalleled swim with one of the world's biggest snakes, the anaconda. now he's on a mission to prove there's more to brazil than rain forests. so he's agreed to show "nightline" his most prized and most secret spots. getting there, not easy. it's just dirt and some grass. we transferred to these skiffs and spent hours exploring. >> black vultures eating a kaman carcass. >> reporter: it is the world's largest fresh water wetland, home to the largest concentration of wildlife in the americas, including its biggest cat, the jaguar.

>> if you see a jaguar, do like this. >> reporter: make ourselves big. >> and do not move. if we run, we're telling him we are prey. so we should not -- never, ever run. >> reporter: yeah, you don't want to end up like this. lawrence captured one of the rarest jaguar kills ever >> imagine an animal that has the strength the break the neck of a big cattle. >> reporter: this is lawrence's world. but the shots shows that it takes agonizing months to capture. >> reporter: i've spent up to seven hours watching the same animal taking a nap. >> reporter: on to his next favorite spot, this time to brazil's savannah. we roll out scouting for one of

his favorites, the giant ant eater. it just moved. >> he can face a jaguar. when he opens the claus, the jaguar will avoid him. >> reporter: but his best defense is always flight. >> this animal is not aggressive. >> reporter: lawrence promises a reward. a swim. you keep talking about this. >> i keep talking and you won't be disappointed. it is as advertised. >> reporter: bonito springs, so purified they say visibility is 100 feet. i admit i was not a believer, but now i've been baptized by its beauty. that's insane. it looks like a screen saver. like one of those fish screen savers on an lcd screen. >> reporter: as if there is no wat water. it just doesn't look real. it's a glimpse of lawrence's secret brazil.